Tribological　performance　of　new　brake　pair　is　studied　at　different　temperatures,　load　and　speed　by　variable　temperature　friction　and　wear　test.　The　research　indicates　that　brake　pair　has　better　frictional　characteristics　at　variable　temperature　as　well　as　heat-fade　resistance　performance　at　high　temperatures.　Wear　rate　of　brake　block　and　brake　disc　increases　with　friction　temperature　rising,　however　wear-resisting　performance　of　brake　disc　is　comparatively　stable.　Load　has　less　influence　on　frictional　coefficient　of　brake　pair.　Wear　rate　of　brake　disc　and　brake　block　increases　with　load　increasing,　but　brake　block　has　comparatively　stable　wear-resisting　performance.　Frictional　coefficient　of　brake　pair　increases　and　tends　to　stabilize　gradually　along　with　sliding　speed　increasing,　and　speed　has　less　influence　on　wear　rate　of　brake　block　and　brake　disc.　Initial　heat-fading　occurs　in　brake　block　material　along　with　frictional　temperature　rising,　secondary　solidification　may　happen　when　frictional　temperature　reaches　a　certain　value.　When　temperature　rises　much　higher,　brake　block　begins　to　soften　and　plastic　flow　intensifies,　in　addition　thermal　decomposition　occurs　in　organic　substance　and　wear-resisting　performance　becomes　poorer.　Build-up　welding　material　has　strong　age-hardening　effect　and　stable　thermal　structure,　which　leaves　surface　hardness　and　structure　performance　of　brake　disc　unchanged　at　high　temperatures.